Question

# Find the surface area of a cone.

A
8635 m2
B
86.35 m2
C
0.8635 m
D
8.635 m2

Solution

## The correct option is D $$\displaystyle 8.635{ \ m }^{ 2 }$$Surface area of a cone $$\displaystyle =\pi rs+\pi { r }^{ 2 }$$$$\displaystyle =3.14\times \frac { 1 }{ 2 } \times 5+3.14\times \frac { 1 }{ 2 } \times \frac { 1 }{ 2 }$$$$\displaystyle =7.85+0.785$$$$\displaystyle = 8.635{ m }^{ 2 }$$So, option D is correct.Mathematics

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